Moreover, the "Farmville" maker lowered its full-year guidance, citing the delayed launch of new games and features.
Zynga shares dropped as much as 10 percent in after-hours trading.
The game maker also said the number of monthly users fell to 130 million during the quarter, from 187 million a year ago.
"While our quarterly financial results were in line with our guidance range, we aspire to do better and improve execution across our business," Zynga CEO Don Mattrick said. "By Q4 of this year, approximately half of our game-related research and development will be allocated to new and recently launched games."
Wall Street on average had expected bookings, an indicator of future revenue, to rise to $191.2 million in the second quarter, from $187.6 million in the same period a year earlier.
—By CNBC's Karma Allen